And it’s a lot like “Scramble With Friends,” a game from Zynga which came out halfway through 2012. “Scramble With Friends” has been out for several months, but appears to have lost out on the top spot to a game that bears some similarities. But Ruzzle has also been out for a similar period of time, according to AppData.

Most of these games aren’t necessarily 100% original — but Zynga is used to being the dominant game in each category, which it enjoys with its take on Scrabble called “Words With Friends.”

It goes to show how fickle the App Store and iPhone users can be.

It’s still interesting given that Zynga — as many others in the industry — often finds itself making games similar to those already in the ecosystem. In the end, the best game in the ecosystem wins — whether it’s Zynga’s or anyone else’s.

There are some differences. Ruzzle doesn’t have the kind of “power ups” that “Scramble With Friends” has. But maybe that is the hook that is attracting players. By contrast, there are no in-app purchases for Ruzzle — just an option to upgrade to a version without advertisements.